The present invention relates to telechelic polymers having crosslinkable end groups of the formula
1
and methods for preparing the same wherein n is an integer;
2
is an alkadienyl group; Y is an alkyl group; and Z is crosslinkable end group. In general, the inventive synthesis involves reacting a functionalized chain transfer agent having crosslinkable ends with a cycloalkene in the presence of a ruthenium or osmium catalyst of the formula
3
wherein:
M is ruthenium or osmium;
X and X
1
are independently any anionic ligand;
L and L
1
are any neutral electron donor ligand;
R and R
1
are each hydrogen or a substituted or unsubstituted substituent wherein the substituent is selected from the group consisting of C
1
-C
20
alkyl, C
2
-C
20
alkenyl, C
1
-C
20
alkynyl, aryl, C
1
-C
20
carboxylate, C
1
-C
20
alkoxy, C
2
-C
20
alkenyloxy, C
2
-C
20
alkynyloxy, aryloxy, C
2
-C
20
alkoxycarbonyl, C
1
-C
20
alkylthio, C
1
-C
20
alkylsulfonyl and C
1
-C
20
alkylsulfinyl. In another aspect of the invention, methods for controlling the molecular weight of the resulting telechelic polymer are also presented.
本发明涉及具有式 1 可交联末端基团的远志聚合物。
1
及其制备方法,其中 n 为整数;
2
是烷二烯基;Y 是烷基;Z 是可交联端基。一般来说,本发明的合成方法是将具有可交联端基的官能化链转移剂与环
烷烃在
钌或
锇催化剂的存在下进行反应,反应式为
3
其中
M 是
钌或
锇;
X 和 X
1
独立地为任何阴离子
配体;
L 和 L
1
是任何中性电子供体
配体;
R和R
1
均为氢或取代或未取代的取代基,其中取代基选自由 C
1
-C
20
烷基、C
2
-C
20
烯基,C
1
-C
20
炔基、芳基、C
1
-C
20
羧基,C
1
-C
20
烷氧基、C
2
-C
20
烯氧基,C
2
-C
20
炔氧基、芳氧基、C
2
-C
20
烷氧基羰基、C
1
-C
20
烷
硫基,C
1
-C
20
烷基磺酰基和 C
1
-C
20
烷基亚磺酰基。本发明的另一方面还提出了控制所得远志聚合物分子量的方法。